Seriously, we know so little about what might be in the sea, imagine being stuck somewhere, alone, in the middle of the ocean, and you feel something large stroke your feet.
People might find this weird, but screw you, the ocean is terrifying :|
I'm absolutely horrified of any type of bug/insect. It's really bad.
I've had nightmares, panic attacks, the whole nine yards.
The only exception would be fireflies. I like to catch them over the summer and keep them in a jar in my room - a jar from which they can't escape. I can't catch them with my hands either. Someone else has to catch them for me.
Uuugh, I'm getting shivers just thinking about bugs. U_U